Originally Posted by valdas
I think you are talking about working solution, not concentrate. Open concentrate should last about 24 weeks (based on the datasheet that comes with the package).
i thought both working solution and concentrate, basically the moment you open the bottles.
good to know though that the concentrate will last 24 weeks or 6 months.
found an opened kit in one of our shelves but it has probably been opened for over a year now.